html, body, a, ul, li {
  margin: 0;
  padding: 0;
}
ul {
  list-style: none;
  width: 300px;
  line-height: 300px;
  background-color: rgb(245, 245, 213);
}
ul li.time {
  text-align: center;
  font-size: 36px;
}
ul li.list {
  padding-left: 10px;
  line-height: 100px;
  font-size: 24px;
}
a {
  display: block;
  padding: 15px;
}
@keyframes rotate {
  0% {
    transform-origin: center;
    transform: rotate3d(0, 0, 1, -200deg)
  }
  100% {
    transform-origin: center;
    transform: none
  }
}
.rotate {
  animation-name: rotate;
  animation-duration: 1s;
  animation-iteration-count: 1;
}
.num {
  width: 200px;
  padding: 15px;
  text-align: center;
}
.num button {
  padding: 10px;
  margin: 5px 10px;
}